diff options
| author | Yuval Adam <yuv.adm@gmail.com> | 2012-10-29 23:06:01 +0200 |
|---|---|---|
| committer | Yuval Adam <yuv.adm@gmail.com> | 2012-10-29 23:06:01 +0200 |
| commit | 4ba8614c006f9828f0796c140bc3e13c9e67938c (patch) | |
| tree | ad204651c733250d27d20fce8820f9747c43c883 /utils/sine.h | |
| parent | e018ceebed74b8223482bc9d1ed0b31c938381da (diff) | |
Added utils
Diffstat (limited to 'utils/sine.h')
| -rw-r--r-- | utils/sine.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/utils/sine.h b/utils/sine.h new file mode 100644 index 0000000..9c91255 --- /dev/null +++ b/utils/sine.h @@ -0,0 +1,85 @@ +//*****************************************************************************
+//
+// sine.h - Prototypes for the fixed point sine trigonometric function.
+//
+// Copyright (c) 2006-2012 Texas Instruments Incorporated. All rights reserved.
+// Software License Agreement
+//
+// Texas Instruments (TI) is supplying this software for use solely and
+// exclusively on TI's microcontroller products. The software is owned by
+// TI and/or its suppliers, and is protected under applicable copyright
+// laws. You may not combine this software with "viral" open-source
+// software in order to form a larger program.
+//
+// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
+// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
+// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
+// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
+// DAMAGES, FOR ANY REASON WHATSOEVER.
+//
+// This is part of revision 9453 of the Stellaris Firmware Development Package.
+//
+//*****************************************************************************
+
+#ifndef __SINE_H__
+#define __SINE_H__
+
+//*****************************************************************************
+//
+// If building with a C++ compiler, make all of the definitions in this header
+// have a C binding.
+//
+//*****************************************************************************
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+//*****************************************************************************
+//
+//! \addtogroup sine_api
+//! @{
+//
+//*****************************************************************************
+
+//*****************************************************************************
+//
+//! Computes an approximation of the cosine of the input angle.
+//!
+//! \param ulAngle is an angle expressed as a 0.32 fixed-point value that is
+//! the percentage of the way around a circle.
+//!
+//! This function computes the cosine for the given input angle. The angle is
+//! specified in 0.32 fixed point format, and is therefore always between 0 and
+//! 360 degrees, inclusive of 0 and exclusive of 360.
+//!
+//! \return Returns the cosine of the angle, in 16.16 fixed point format.
+//
+//*****************************************************************************
+#define cosine(ulAngle) sine((ulAngle + 0x40000000))
+
+//*****************************************************************************
+//
+// Close the Doxygen group.
+//! @}
+//
+//*****************************************************************************
+
+//*****************************************************************************
+//
+// Prototype for the fixed point sine function.
+//
+//*****************************************************************************
+extern long sine(unsigned long ulAngle);
+
+//*****************************************************************************
+//
+// Mark the end of the C bindings section for C++ compilers.
+//
+//*****************************************************************************
+#ifdef __cplusplus
+}
+#endif
+
+#endif // __SINE_H__
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